Volume 96, Issue 9 e11123
RESEARCH ARTICLE

Microplastic evidence assessment from water and sediment sampling in a shallow tropical lake

Samuel Macario Padilla-Jimenez

Samuel Macario Padilla-Jimenez

Instituto Politécnico Nacional, CIIDIR Unidad Michoacán, Jiquilpan de Juárez, Michoacán, Mexico

Contribution: ​Investigation, Writing - original draft, Methodology, Writing - review & editing, Formal analysis

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Rodrigo Moncayo-Estrada

Rodrigo Moncayo-Estrada

Instituto Politécnico Nacional, CICIMAR Centro Interdisciplinario de Ciencias Marinas, Avenida Instituto, La Paz, Baja California Sur, Mexico

Contribution: Software, Formal analysis, Data curation, Writing - review & editing, Writing - original draft, Validation

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Daniel Tapia Maruri

Daniel Tapia Maruri

Instituto Politécnico Nacional, CEPROBI, San Isidro, Morelos, Mexico

Contribution: Visualization, Writing - review & editing, Formal analysis

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Dioselina Álvarez-Bernal

Corresponding Author

Dioselina Álvarez-Bernal

Instituto Politécnico Nacional, CIIDIR Unidad Michoacán, Jiquilpan de Juárez, Michoacán, Mexico

Correspondence

Dioselina Álvarez-Bernal, Instituto Politécnico Nacional, CIIDIR Unidad Michoacán, Justo Sierra Ote. 28, Centro, Jiquilpan de Juárez, Michoacán 59510, Mexico.

Email: [email protected]

Contribution: Conceptualization, ​Investigation, Funding acquisition, Writing - original draft, Validation, Writing - review & editing, Project administration, Resources, Supervision

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First published: 02 September 2024
Citations: 1

Abstract

Microplastics (MPs) severely threaten inland waterbodies due to the direct impact of human activities. In the present study, spatial and temporal patterns of MPs in a shallow tropical lake were assessed, describing their size, morphology, and polymer types. Water and sediment samples were collected from Lake Chapala during three seasons, and MPs were quantified with a stereomicroscope. The structure, elemental composition, and polymeric composition were determined via environmental scanning electron microscopy and Fourier transform infrared spectroscopy. The highest average concentration of microplastics in Lake Chapala was detected during the low-water period in April 2022 (2.35 items/L), exceeding the July 2022 rainy season concentration (1.8 items/L) by 0.25 items/L, and sediment concentrations were also higher in April 2022 (219 items/kg) compared to July 2022 (210 items/kg). This study highlights the significant pollution of Lake Chapala with microplastics, emphasizing the need for urgent measures to manage plastic waste and mitigate its environmental impact on aquatic ecosystems.

Practitioner Points

  • Microplastic contamination was evaluated in Lake Chapala.
  • The distribution profiles of microplastics were different in each area.
  • Heavy metals osmium, tellurium, and rhodium were found associated with the PMs.
  • Polymers were found in this study.

Graphical Abstract

Findings of microplastic in a shallow tropical lake.

DATA AVAILABILITY STATEMENT

The data that support the findings of this study are available from the corresponding author upon reasonable request.

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